Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | import type { Types } from '@cornerstonejs/core';
import _getHash from './_getHash';
import _setNewAttributesIfValid from './_setNewAttributesIfValid';
import _setAttributesIfNecessary from './_setAttributesIfNecessary';
import { SVGDrawingHelper } from '../types';
/**
* Draws an SVG polyline with the given points.
*
* The `connectLastToFirst` option, if true, draws a closed polyline, with the
* last point connected to the first.
*/
export default function drawPolyline(
svgDrawingHelper: SVGDrawingHelper,
annotationUID: string,
polylineUID: string,
points: Types.Point2[],
options: {
color?: string;
width?: number;
lineWidth?: number;
lineDash?: string;
connectLastToFirst?: boolean;
}
): void {
if (points.length < 2) {
return;
}
const { color, width, lineWidth, lineDash } = Object.assign(
{
color: 'dodgerblue',
width: '2',
lineWidth: undefined,
lineDash: undefined,
connectLastToFirst: false,
},
options
);
// for supporting both lineWidth and width options
const strokeWidth = lineWidth || width;
const svgns = 'http://www.w3.org/2000/svg';
const svgNodeHash = _getHash(annotationUID, 'polyline', polylineUID);
const existingPolyLine = svgDrawingHelper.getSvgNode(svgNodeHash);
let pointsAttribute = '';
for (const point of points) {
pointsAttribute += `${point[0]}, ${point[1]} `;
}
if (options.connectLastToFirst) {
const firstPoint = points[0];
pointsAttribute += `${firstPoint[0]}, ${firstPoint[1]}`;
}
const attributes = {
points: pointsAttribute,
stroke: color,
fill: 'none',
'stroke-width': strokeWidth,
'stroke-dasharray': lineDash,
};
if (existingPolyLine) {
// This is run to avoid re-rendering annotations that actually haven't changed
_setAttributesIfNecessary(attributes, existingPolyLine);
svgDrawingHelper.setNodeTouched(svgNodeHash);
} else {
const newPolyLine = document.createElementNS(svgns, 'polyline');
_setNewAttributesIfValid(attributes, newPolyLine);
svgDrawingHelper.appendNode(newPolyLine, svgNodeHash);
}
}
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